Humic acid-based composite water retaining agent and preparation method thereof

Abstract

The invention belongs to the technical field of water absorbing resin and relates to a humic acid-based composite water retaining agent. The humic acid-based composite water retaining agent solves thetechnical problem that the existing agricultural water retaining agent has a high cost, poor salt tolerance and poor water retention performances. The humic acid-based composite water retaining agentcomprises, by weight, 1 to 5 parts of potassium humate, 20 parts of acrylic acid, 8 to 14 parts of potassium hydroxide, 1 to 5 parts of 2-acrylamido-2-methylpropanesulfonic acid, 100 to 160 parts ofcyclohexane, 1 to 2 parts of a dispersing agent, 0.1 to 0.5 parts of an initiator, 0.008 to 0.05 parts of a water-soluble crosslinking agent, 0.008 to 0.04 parts of an oil-soluble crosslinking agent,0.02 to 0.1 parts of a coupling agent, 0.2 to 5 parts of bentonite and 0.2 to 5 parts of kaolin. The invention also provides a preparation method of the humic acid-based composite water retaining agent.

Description

technical field [0001] The invention belongs to the technical field of water-absorbing resins, and in particular relates to a humic acid-based composite water-retaining agent and a preparation method thereof. Background technique [0002] my country is a country with a large area of ​​semi-arid, arid and desert areas. Drought and water shortage and the resulting land degradation are one of the important factors restricting the sustainable development of agriculture. Effectively implementing agricultural water-saving measures in drylands, actively developing agricultural water-saving and moisture-conserving technologies, and scientifically utilizing limited regional water resources are not only the only way for the development of modern dryland agriculture, but also a major problem in the organic reconstruction of soil in arid areas. [0003] The water-retaining agent is a moderately cross-linked, highly expandable polymer water-absorbing gel with a complex network structure,...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a humic acid-based composite water-retaining agent and its preparation method. Two kinds of clay are added to the structure of the water-retaining agent through in-situ polymerization, surface crosslinking, and surface coating modification technology to form an internal A humic acid-based composite water-retaining agent with a core-shell structure that is loosely cross-linked and tightly cross-linked outside, to solve the technical problems of high cost, salt tolerance and poor water-retaining performance of existing agricultural water-retaining agents

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